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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '865f20bde6d0c6d47fdcc071462dd2cd8c7ce64d3c2471bf5065c92e7ad91a00' 
  AND token = 'vA9SDX+KYNXnf/cajhHdzK/vzjAGRdblnctVStQtUK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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