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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85885422a417fa5a8aee82389eefcecceac81209a8fc9d918e9ab6a0576cce76' 
  AND token = 'XxP8fpLA91s4E+2Yu9Qx99wUEs8MairqlPXDeF3Fa3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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