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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88eddb1b916eb4ab8a25c083c407e7c493f977322bfd87b967ad03f19fa010a3' 
  AND token = 'bbv6qYfGzCK4RmQbNW22KCC0I0OA1WWSZHlLAdObOLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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