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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2213f1ee44ab5bab41c490dbaed9eeb788d1f0f95c0040ad8399ecb53afb6a3a' 
  AND token = 'ogAxlK+xr6NUBFELlsMLxpfWf7WCG3Rl7uPXFcYKRIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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