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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10aede913a6e12a85c812aef95446dd79cabb802b08a52557352c94e79422c07' 
  AND token = 'j0UxBSJLfByKi97VaB8ha8R8EWj2k0Pt1v5fU/tgtXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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