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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2bba5daff86d599cd26d880898732aea74b10971f2766d50250969efb958e89' 
  AND token = '7br1G4V2W3Lo+ASO92RPHaUvZJGdhVuT7rJfSjN71L4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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