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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'da92934ca05dcc8809277576849e77810f4c4c4745c25116a092c22c5eb56b6e' 
  AND token = 'F1vANdZDFJ3OasSnAiMe9h0XArB8a6MRew0190VDbfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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