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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be73426a5f8f72b5b8529a9faaa5f71fab9228f0264ad4697e01f45062cd0a36' 
  AND token = 'mwwc2jatMWoXUqsqStdeY8TSeJaHkMDLjwPs+HtK6/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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