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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b08d9f6c0e9db19ff202507574c9f8254027eb61381740337ed0263f95f228fa' 
  AND token = 'YVCadmwGEh5oEjU49A6nlt1byp2+VmG5M7XoccywNpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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