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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0ed4d8752a337c3cb7b72be3957a9f1bf05d9f1ddd7934504f8526ef79ca908' 
  AND token = 'rtSbNFOWBd9e7diF4wuJ5VDW0WbPxtB1z69rjWNpfb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00229

JSON explain

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