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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '457e370cc398825495863a6bb9e626975715a2dec24a9c6d555ff9b3a51bab99' 
  AND token = 'n3ICdjaWwVNn3iCLR8RpM8ztEx6cKdh4HmbdPYtJGBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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