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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c3060d51247b8532d3bbfd69c79e7e05437bb4d68170296e582961ced48d411' 
  AND token = 'i1Sh/OnxdO9/C78M14x2+AQkW+76ddvnz/lS3PoA1w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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