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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b462cabddf7bdfc5bc92b5435666aa5baf82185bfc7dfa9d43d5a95297066ecb' 
  AND token = 'tMuZC66mBaXTgRT9lF0UeuQ8CD4JVbLjfSMNA5WdnJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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