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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95e72fd441526335c283d4deef4f8871e258fc94c00ed3b31480ae53d6ed2d81' 
  AND token = '1AoBSY0ZLtw8Rd4EggtdS2XxjQKxVZJuM2vC/Wk8OoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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