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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '011edf9c0e8f1d3de497a4557f92dad4f4e0bf4842d7f0d1bacf20714e3dd222' 
  AND token = 'es9sspN4QqqFe+1A2HyQ7ENNCBhBOjm4UFHYSTuDxRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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