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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8893c32670a9eb90558b30376d0c96dcd4df60bac5c29837e56ed4247998fd7c' 
  AND token = 'yqs3AX975Pwvff4MLIu12LBQ+PfUpbOquFcgXvwQNis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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