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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57758330d61bae183384f2aed373e4771c342e05575d37c3c34a6f5aa26204e4' 
  AND token = 'zAMXPuLLJv/yIW6Qg0YrMslMw+Gx+tRzD3pQxXmxrIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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