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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5577b257f2a44ac04253637f3568a16945909b004a23301c8ead82cf06457ba' 
  AND token = 'oD4opkqR2QjWsMm5Go7u50O+/HTiHZb2kN5EOwDP1/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}