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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '855bc912e913fb92365bdc53b021ecb027e1e767ca84590ec4b8271e119ef177' 
  AND token = 'CvcVYkFtKqjlVAz9B235fmsWHs48XEg5WOau+ukiIQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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