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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40adcd47ecc821a5054c93de3cdeba6c5795ecc955651a53d27be8ef9d96fd61' 
  AND token = 'IA6YQ8phaDQcCVoNCQcMY2Fkmf7uLUFMx6PZxy4WLRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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