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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a4fab627a08787581641788b48a608dcc90282d56c4f19d2693592a3b90dee83' 
  AND token = 'ModIlWymJ6k8cXuWS2NFAce4GyKsS4JEzKStNCSantA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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