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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f97c1e8df310fc22f7788676be63b4caeb77eaf1e95e721e2fb86337771620ae' 
  AND token = 'JF3otX2mdMSqKqEAouu7OsqvFF4OMKtSvB4FHIACAhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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