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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f73dd2b981e99aafd0f6450862e583408412674e120a9090980a21b685c5385' 
  AND token = 'Y9Vcsjd7bPPA/SL7gJFByAbH0M99T6SvRqp3GS/JkmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00271

JSON explain

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