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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e9bc5ddad88efb76c1ee6f4e02cfc6d8485367b8d172a88f44e48e735dfba03' 
  AND token = 'MGogU9SXDiZ7sf5PuVE2srcp9J+6eDzTX5fmHj8xQJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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