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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '180598febd7df1384f5b1b7960f32549fb04490e79f1f61c31219e3d974176bf' 
  AND token = 'pdg60yHOPk6C66t+VheTIzEKIfjD/bnOMfPqVkZ/cl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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