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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97341e021b95dab8514bb0497e279a4f884dcdfb164fe1e6ba6e90888572b9e8' 
  AND token = 'SvaW51HMHD7GqCfNH20ItAvNFTA202bN6la2tg7YS5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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