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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29d8ba16f6a23e8639f57b6f40afaf1933d224d782715f57ee61bf2064238736' 
  AND token = 'fZNVtzXng1K4qaM/K78H6efvdxbhcvOLrzuhZr2N2Us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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