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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03ba4c6afa90c9ef08169ff10bb4b699a87195c717e51956d55709f5381ecdc1' 
  AND token = 'E54Epu0cGER6iMjDChpNu1owjfrAUPNiF5Ndyvv/hhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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