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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '111c9859d29cfa5d3d90e6721d5470cff8bcef5bc4ca7c3750d8fb318015e6b3' 
  AND token = 'C+en8o6cNd8IurVyYhYi8fYCUmbYcSNJ3OvXCQENYJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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