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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd72b5a5699faf541f3511a31e937ec41ee3e6726ec4ce5bf9c63a5bfdd150b' 
  AND token = 'w8d/8GcdxQI9ShinCeRiHgtuwfphOjqiWUJ2+fM603o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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