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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00da29396e0783cc4ac78f26f8ff8b36e758d09be3bdabf578830e72c88befcb' 
  AND token = 'xtXE/wQLw3yqI20fW2bFFO0evZSrhGv+u9ugkcJdlhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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