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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1228e0682d03ca3b9fc4a1cfb7b7016cd1d90cc17bc23974510b37766e7ac6a9' 
  AND token = 'Guv4vnnH2MaYwZ7iYj+7np9paL62asSr+Ujq4CEW1Jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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