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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06025aab8eea62d3fe1ef25c31778b3442ae0f8e730e34ddfbd2e714542395a5' 
  AND token = '/8w5ZZumLCRM76y0U9dV3M+uGAa9/b5KBqn0umztQ70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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