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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8569973c4a9942ad97e6ccd6cf7fc1fd42385cfec72b6c6774137847ba28ee54' 
  AND token = 'H1Z0aQAL4bDxb9OsyKpA7y11jKnELb2EGseZW44KS1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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