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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7480b22841c3c7c982580126e579e51dc7e8b1599fae68760c93f9582d77cdc0' 
  AND token = 'Ce1NmrB4ME3LH/Y0gv7MuBi758zSyJnP62+iJxH1hF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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