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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e46e7875618436f67eee0ff4fdf7ceb8852abdf6073a745f5fafd7038ee917d2' 
  AND token = 'JYIa+pEJcN2j5uXUBvYDMs0Ll11/g0IFbJvfWrHQoFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00106

JSON explain

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