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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bada2dd9427344616c5d51fa839fcff22e97f81acbb20942e583f78bbd1e6b8b' 
  AND token = 'anTuv+M0s/21ptcR3m+t8f3Hfg4gsRI3iEnzEmerD2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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