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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3aeb1a90fb94a3440e10e76b9c4e79118e7e590333eb9462d7b24be233ea2fbb' 
  AND token = 'dZ7utNGt8ObTYZlIN58kMLuEhelaQMoPdRAp6DqX3dY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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