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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab223a1356c1ea8114fcf59102638a01cfdf8d2b8d9296a3ac3199cc933e067e' 
  AND token = 'd1GU4Rwkv+V9zEIBHXZkj+cvu62OZCXcwfbdZZZELG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00432

JSON explain

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