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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a86b7a2f70fe96eed3a4a854e675ddb8b050fa2fb7dc4562e4adf2222ecc85e' 
  AND token = 'UOFPbXH92cFpx5VfHwFmBbvnWPUo6nTLOrHm0IF2av8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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