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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eb5bdc6685c6be106ef67493178de1a3ba089251ea10204d116ad360e37628a' 
  AND token = 'kGzDgUAfPMJzoCH0BgSAmlV8eapj/9U7NQgfcAYBYsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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