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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04d1bbaf176e64e8607f4377ab3fd2a792795fb223bc400b4eaa419f46c1d47f' 
  AND token = 'douL0RmEEYSWTwgNO41N3EPoCTz55hNsk6KY2BpjOe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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