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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5cabae49b30a761cc750b9e18836323ed741858c97fddd4b1b26fb7ee05d001' 
  AND token = 'iBdFnqYt/R06CbWlpabVTgcqAj1JknX0adu5ib7T5bc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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