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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5806812c2265978c8dd6657130265a65e2c652699b660cdde8cc0a9ef474a28' 
  AND token = 'ERz2keRr4DPrSm3ha7wsRletWAeWLf8t4nrjvLVelM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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