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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc41776c4bd6aa67935a59cc5d447e49ecbdc7ec4ec1241abbd2352a9ba8776f' 
  AND token = 'Hk5QaFXzPsa5KYrbjSPaGqcV4O66ww9PhDae3aDDwZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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