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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70c058bab4570fd9ce305e6a3ea02d9d744d76b8e70b8c4222a108a3c4e0652e' 
  AND token = 'EGSZ6XSpl14/ZC3snXO2KY5pj8QbD+CSlTB2pazYjAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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