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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32f08d1fdb7e5109ecbf130cc71914af700d5e767243e5fefb777b5de5d7e67c' 
  AND token = '42E+cY8FIOpzoaG70SD2/e1lcEwLcIoBlr0GLcMrFKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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